Danny and the team travel back to Canada in the 1870s to investigate the Great Amherst Mystery - one of the most famous and perplexing paranormal cases to come to light during the Golden Age of Spiritualism.
18 year old Esther Cox is the centre of a series of inexplicable, possibly paranormal events - phantom knocking, ghostly messages, and a series of spontaneous fires that start inside the walls of her house.
But is she the victim of a possible paranormal entity, or the mastermind of a devious hoax?
Presented by Danny Robins
Experts: Evelyn Hollow and Dr Ciaran O'Keeffe
Story sections by Sarah Morgan
Research by Nancy Bottomley
Filming and editing by Robb Leech
Editing and sound design by Charlie Brandon-King
Theme music by Katherine Priddy
Theme co-produced by Jennifer Ann Keller
Incidental music by Evelyn Sykes
Commissioning executive: Paula McDonnell
Commissioning editor: Rhian Roberts
Produced by Simon Barnard and Victoria Lloyd
A Bafflegab and Uncanny Media production for BBC Radio 4